US6441778B1 - Pet locator - Google Patents
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- US6441778B1 US6441778B1 US09/678,571 US67857100A US6441778B1 US 6441778 B1 US6441778 B1 US 6441778B1 US 67857100 A US67857100 A US 67857100A US 6441778 B1 US6441778 B1 US 6441778B1
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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/0009—Transmission of position information to remote stations
- G01S5/0018—Transmission from mobile station to base station
- G01S5/0027—Transmission from mobile station to base station of actual mobile position, i.e. position determined on mobile
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- G—PHYSICS
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
- G01S19/16—Anti-theft; Abduction
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- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/14—Receivers specially adapted for specific applications
- G01S19/17—Emergency applications
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- G—PHYSICS
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/34—Power consumption
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/08—Logistics, e.g. warehousing, loading or distribution; Inventory or stock management
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0241—Data exchange details, e.g. data protocol
- G08B21/0247—System arrangements wherein the alarm criteria uses signal strength
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0261—System arrangements wherein the object is to detect trespassing over a fixed physical boundary, e.g. the end of a garden
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0269—System arrangements wherein the object is to detect the exact location of child or item using a navigation satellite system, e.g. GPS
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/35—Constructional details or hardware or software details of the signal processing chain
- G01S19/36—Constructional details or hardware or software details of the signal processing chain relating to the receiver frond end
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- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S2205/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S2205/001—Transmission of position information to remote stations
- G01S2205/008—Transmission of position information to remote stations using a mobile telephone network
Definitions
- the present disclosure pertains generally to electronic locating devices for determining the location or position of a pet or an object, and more particularly, a device for determining the location or position of a pet by utilizing the capabilities of two-way paging systems and satellite navigation systems.
- the position of an individual truck is determined by coincident reception of signals from at least three navigation satellites by a satellite navigation system receiver, which position can then be stored or can be transmitted to a central receiving station via some sort of wireless link.
- the wireless link can be a two-way communication link wherein the positioning information is only transmitted in response to receiving a request.
- the satellite navigation system receiver that must be included in a locating device requires the use of substantial electrical energy during the period in which the location information is being acquired and developed from the GPS system.
- a small portable object locator in addition to minimizing the use of electrical power while being subject to less than ideal orientations to enable quick and efficient location by the GPS system, must also be very simple and easy to use.
- a locating device for attachment to an animal and adapted to obtain and communicate location information about the animal to a fixed or mobile base station, comprising a controller having a memory, an input for location data and a first communication port; a satellite navigation system receiver coupled to a first antenna and having a location data output coupled to the location data input of said controller; a communication transceiver coupled to a second antenna to receive and transmit communications between the locating device and the base station and having a second communication port coupled to the first communication port of the controller; and a housing to enclose the controller, the satellite navigation system receiver and communication transceiver, configured to be attached to the animal.
- the controller upon activation operates automatically to obtain location data from the satellite navigation system receiver via the location data output, store the location data in the memory and cause the location data to be accessed from the memory, coupled to the communication transceiver and transmitted to the base station.
- the controller in the locating device is adapted to become activated when the locating device is secured to the animal, power is coupled to the locating device and the animal passes a perimeter enclosing an area.
- the perimeter is specified by one or a plurality of coordinate positions defined by the location data obtained by the locating device.
- a system for locating a mobile object beyond a designated area comprising a wireless bidirectional communication system, a first transceiver operable as a fixed or mobile base station in said communication system to receive and display location information and transmit commands, and a locating device attached to the mobile object and operable as a mobile station in said communication system to respond to the commands and, upon activation, to obtain location information and transmit it to the first transceiver.
- the operation of enabling the satellite navigation system receiver in the object locator may be controlled by duty cycle controls which activate the satellite navigation system receiver to periodically check the location of the animal or object. Upon determining that the animal or object is outside a specified perimeter designating an area, a message signifying such location is automatically transmitted to a base station.
- FIG. 1 illustrates a block diagram of an object locator system of the present disclosure.
- FIG. 2 illustrates a pictorial example of an object locator according to the present disclosure
- FIGS. 3 a - 3 c illustrate a pictorial drawing of an object locator supported by a collar according to the present disclosure
- FIG. 4 illustrates a block diagram of the object locator of the present disclosure
- FIG. 5 illustrates a flowchart of the operation of the object locator generally
- FIG. 6 illustrates a flowchart of the operation of the object locator subject to an additional external control
- FIG. 6 a illustrates the operation of an alternate embodiment of the object locator of FIG. 6;
- FIG. 6 b illustrates the operation of another alternate embodiment of the object locator of FIG. 6;
- FIG. 7 illustrates a pictorial drawing of a range dependent enablement system used to provide external control for the object locator
- FIG. 8 illustrates a block diagram of a base station that may be used with the object locator of the present disclosure
- FIG. 9 illustrates a block diagram of an alternate embodiment of a base station that may be used with the object locator of the present disclosure
- FIG. 10 illustrates a flowchart of the operation of the object locator system of the present disclosure in obtaining location data via two-way paging
- FIG. 11 illustrates a block diagram of an alternate embodiment of the object locator of FIG. 4 .
- the object locator system 10 includes a two-way paging system 12 , a satellite navigation system shown as a GPS system 50 and the object locator 42 . While the described embodiment shows a GPS system for illustrative purposes, it is intended to function with other satellite navigation systems such as, for example, the Russian GLONASS system, which provide location information in the vicinity of the earth.
- the two-way paging system 12 is a conventional paging system that is well known in the art, for example, such as illustrated and described in U.S. Pat. No. 5,423,056 issued Jun. 6, 1995 to Lindquist, et al.
- the two-way paging system 12 interacts with a base station 18 over a transmit path 14 and a receive path 16 .
- the base station 18 which may also be called a host, designating the position of a system user, may be a two-way pager and may include a telephone or a keyboard or the like or may have an input 20 for receiving a dialed-in telephone number from telephone set 24 along communications path 22 or from wireless telephone set 25 over communications path 31 .
- the input 20 is responsive to dual tone multi-frequency (DTMF) tones transmitted by telephone set 24 .
- the input 23 is responsive to digital signals transmitted over path 21 from a key array 13 .
- Base station 18 further has an output 26 from which location data to be displayed travels along path 28 to display 30 .
- Display 30 may be configured to display location information in any of several forms, for example, text, figures, graphics, or numbers.
- the object locator system 10 of the present disclosure includes an object locator 42 .
- object locator 42 In one of its operational modes, as a two-way paging transceiver, object locator 42 includes an input 40 coupled to an antenna 36 along cable 38 for receiving signals transmitted by two-way paging system 12 along path 32 and for transmitting paging signals to the two-way paging system 12 along path 34 .
- the object locator 42 also includes an input 44 for receiving from a GPS system 50 location information signals along path 52 to be intercepted by antenna 48 and conducted to the object locator 42 along path 46 to input 44 .
- the GPS system 50 is of a conventional design well known in the art, an example of which is described in U.S. Pat. No. 5,726, 660 issued Mar.
- location information signals may be received from the GLONASS satellite system or any other satellite navigation system providing location information by the use of a receiving system configured for such reception.
- object locator 42 is intended to be carried or attached to an individual, an object or an animal to be located or tracked by the object locator system 10 of the present disclosure.
- a user enters the system from the base station 18 by dialing the telephone number address corresponding to the object locator 42 by using telephone set 24 or wireless telephone set 25 .
- the DTMF signal then travels along path 22 to input 20 of base station 18 or via wireless path 31 where it is converted to a paging transmit signal and transmitted from antenna 15 along transmit path 14 to the two-way paging system 12 .
- the user may enter an electronic address via the key array 13 connected to the base station 18 along path 21 to an input 23 or via a virtual key array (not shown) incorporated in the base station 18 .
- the resulting paging transmit signal is transmitted from port 19 to antenna 15 through path 17 and further transmitted along transmit path 14 to the two-way paging system 12 .
- the two-way paging system 12 relays the paging message via transmit path 32 to the antenna 36 coupled to the object locator 42 .
- the object locator 42 processes the request for location information transmitted by base station 18 , obtains location information from the global positioning satellite system 50 and transmits a response containing the location information from antenna 36 along path 34 to the two-way paging system 12 which, in turn, relays the location information signal along path 16 to antenna 15 of the base station 18 for processing and display on display 30 .
- Multiple object locators 42 may be in individual communication with base station 18 by virtue of each object locator having a specific electronic address.
- each object locator 42 may be assigned multiple addresses. One address may be unique to the specific locator while at least one additional address may be identical for all locators communicating with the base station whereby the base station may send simultaneous messages to multiple object locators.
- wireless paths 14 and 16 along with antenna 15 may instead each comprise a standard telephone connection to a central office.
- the base station 18 communicates directly over a wireless path with a compatible communications transceiver included in the object locator 42 . Such a system is described further in conjunction with FIG. 11 .
- the object locator 42 is initialized by the user to define one or more geographic coordinates to define an area such as a yard. Only one position need be defined for a small area and only the corners of a large area need be defined, thus conserving memory requirements.
- the locator device is then attached to the animal.
- the object locator 42 is adapted to become operational when the object locator 42 device is secured to the animal and power is coupled to the object locator 42 thereby allowing reception of GPS location information.
- the object locator 42 may be set to monitor location signals continuously or periodically or selectively by a predetermined program.
- the object locator 43 is activated to initiate a message to the base station 18 as will be described hereinbelow.
- FIG. 2 there is illustrated a pictorial drawing of an object locator 42 of the illustrative embodiment as it may be typically configured with a two-way paging antenna 36 and a GPS receive antenna 48 .
- the two-way paging antenna 36 is coupled to the object locator package 37 along cable 38 to an input 40 on the object locator package 37 .
- the GPS receive antenna 48 is coupled along a cable 46 to an input 44 on the object locator package 37 .
- the two-way paging antenna 36 shown in FIG. 2 is intended to represent the fact that this antenna in the object locator 42 is typically of the type found with two-way paging equipment. Such an antenna is typically mounted internal to the pager unit itself and is thereby necessarily of very small dimension.
- the GPS receive antenna 48 is conventionally referred to as a “patch antenna” because of its flat, thin, rectangular shaped design.
- patch antenna is intended to be disposed on an upward, relatively level surface in order to expose it to receive the relatively weak signals transmitted by the global positioning satellite system 50 from the satellites arrayed in the GPS system 50 .
- both of the antennae used in the system may be positioned for optimal reception and transmission and connected to the object locator package 37 using the flexible cables 38 and 46 respectively for the two-way paging antennae 36 and the GPS receive antenna 48 .
- a switch 55 may be provided on the object locator 42 for activating or deactivating the object locator 42 .
- An alpha-numeric display 41 may be included on the object locator package 37 to allow information stored in memory 68 to be viewed. To conserve space, the display 41 may allow a limited number of characters to be viewed at one time.
- a readout control switch 47 associated with display 41 is operable to allow successive viewing of a sequence of data items or scrolling through lines of data.
- a test button 43 is provided to allow the user to manually actuate object locator 42 to send a message to base station 18 thereby testing the communication links 34 and 16 .
- the object locator 42 will likely be exposed to a variety of environmental conditions including exposure to water and temperature extremes. Accordingly, the package 37 containing the electronic circuitry should be resistant to water ingress to the electronic circuitry. The circuitry within the package should be designed for operation under wide temperature variations. Mechanisms for accomplishing such protection are well known in the art and will not be described here.
- FIGS. 3 a , 3 b and 3 c there is illustrated a pictorial drawing of an object locator 42 mounted on the lower side of a collar 45 .
- a collar 45 is configured for supporting an object locator 42 around the body or neck of an animal which is intended to be tracked or located by the object locator 10 of the present disclosure.
- the GPS antenna 48 is attached to the collar diametrically opposite the position of the object locator. This is intentional as will be described hereinbelow.
- the object locator is coupled to the GPS antenna 48 through a cable 46 which connects to the input 44 of the object locator 42 . This arrangement is illustrated in FIG.
- FIG. 3 a may be more clearly shown by looking at the cross section 3 b — 3 b illustrated in FIG. 3 b .
- Section 3 b — 3 b a side view of the object locator mounted on a collar is shown wherein collar 45 supports the object locator 42 at its lower point and supports the GPS antenna 48 at its diametrically opposite upper point.
- the GPS antenna 48 is coupled through cable 46 to input 44 of the object locator 42 .
- a side view identified by cross section 3 c — 3 c in FIG. 3 c shows the opposite side of the collar-mounted object locator 42 assembly.
- Section 3 c — 3 c there is shown the collar 45 which supports the object locator 42 at its lower end and the patch antenna or GPS antenna 48 at its diametrically opposite upper end. Also shown in the Section 3 c — 3 c is a representation of the two-way paging antenna 36 which is coupled to input 40 of the object locator 42 . It will be appreciated that many configurations are possible for arranging or attaching the object locator and its antennae to the collar 45 , including enclosing the GPS receive antenna 48 inside the collar 45 or consolidating the locator and antenna as a unit mounted on or in the collar. Alternatively, the locator and antenna may be distributively arranged on or in the collar.
- the greater mass of the object locator 42 relative to the mass of the GPS antenna 48 and the fact that they are mounted on diametrically opposite sides of the collar 45 enables the object locator 42 to remain in the lowest possible position while the GPS receiving antenna remains in the highest possible position to optimize the reception from the GPS system 50 , though it is not imperative that the GPS antenna 48 remain in the highest possible position.
- the GPS antenna 48 may be positioned within or around the collar 45 or integrated with the pager antenna 36 .
- a mechanism such as a clasp or buckle arrangement (not shown in FIGS. 3 a - 3 c ) may be provided to permit the collar 45 to be opened and closed for securing the collar around the neck or body of the animal to be tracked or located.
- Such clasp or buckle may be electrically integrated with the collar and the electronic circuitry, e.g. constructed with an interlock, such that initial mating of the clasp or buckle will activate operation of the object locator 42 . Any subsequent opening of the clasp or buckle may initiate an alarm message to the base station indicating deactivation of the object locator 42 except when a message sent to the object locator 42 by the base station 18 caused a previous, intentional deactivation.
- the object locator 42 may be deactivated by a signal from the base station 18 , allowing the collar 45 to be removed without causing an alarm indication.
- a collar activating switch 55 may be imbedded in the collar 45 or located on the object locator 42 attached to the collar 45 .
- a security device 49 preferably a flexible metal cable represented by the dashed line in FIGS. 3 a , 3 b and 3 c , which is coupled electrically to the buckle or clasp and through ports 51 and 53 to object locator 42 , provides a closed electrical circuit when the clasp or buckle of the collar 45 closed. Cutting or otherwise breaking security device 49 will cause object locator 42 to immediately initiate a preformatted message alerting the user of the security break.
- the object locator 42 may also be activated upon closing the clasp or buckle when placing the collar 45 around the body of the animal or other object to be tracked or located.
- a manual test of the communication link 34 and 16 between the object locator 42 and the base station 18 may be actuated by manually operated switch 43 . To perform the test, actuation of switch 43 causes the controller to send a preformatted message stored in memory 68 within the object locator 42 over communication link 34 and 16 to the base station 18 .
- FIG. 4 there is illustrated a block diagram for the object locator 42 of the object locator system 10 of the present disclosure.
- a paging receiver 60 is shown coupling a data output 62 along path 64 to an input of controller 66 .
- Controller 66 includes a memory 68 for the storage of location data and a battery 70 for powering the object locator 42 .
- This battery 70 is, in the present disclosure, a rechargeable battery.
- This battery 70 can be a NiCad battery, a Lithium battery or any rechargeable battery, though one-use batteries may also be used.
- a solar cell 71 and associated charging circuitry (not shown) is provided for charging the battery 70 .
- Controller 66 includes a control output 72 which is coupled along path 74 to a control input 76 of paging receiver 60 .
- Paging receiver 60 receives paging communications via antenna 36 R which are coupled along cable 38 R to RF input 40 R of paging receiver 60 .
- GPS receiver 78 for which provision is made to couple location data at an output 80 along path 82 to an input terminal 84 of controller 66 .
- GPS receiver 78 further includes an enable input which is coupled from controller 66 at output 86 along path 88 to the enable input 90 of the GPS receiver 78 .
- the GPS receiver 78 receives GPS signals from the global positioning satellite system 50 at antenna 48 which signals are coupled along path 46 to RF input 44 of the GPS receiver 78 .
- a paging transmitter 92 which is configured to transmit the location data provided by controller 66 at output 98 along path 96 to the data input 94 of paging transmitter 92 .
- Controller 66 also provides an enable output at output 100 along path 102 to the enable input 104 of paging transmitter 92 .
- the paging transmitter 92 when enabled, transmits data received at the data input 94 and couples the signal to be transmitted from the output terminal 40 T along path 38 T to the paging transmitter antenna 36 T for radiation to the two-way paging system 12 . It will be appreciated that the paging system components, while shown as separate functional elements in FIG.
- FIG. 4 may in fact be integrated into a single two-way paging transceiver which share a common antenna represented by reference number 36 .
- the illustration shown in FIG. 4 is intended to provide clarity as to the signal paths that operate during the communication relationship of the object locator 42 with the two-way paging system 12 .
- a number of configurations for coupling the antenna to the paging transceiver are feasible, are well known in the art and will not be described further herein.
- signal detector 106 having an output 108 which is coupled along path 110 to an enable input 112 of controller 66 .
- the signal detector 106 represents any of several optional devices which may enable the more precise control of the object locator 42 by limiting the operation of the object locator 42 to certain external conditions outside the paging communications or the GPS reception areas by the object locator 42 .
- the signal detector 106 provides an output whenever a threshold is crossed by signal energy received from an independent source, e.g., a beacon.
- This threshold may represent a predetermined perimeter beyond which the object locator 42 is enabled to operate and within which a position of the object locator would probably provide no useful information because the object locator may be within line of sight to the base station.
- Other thresholds may be expressed in terms of time or altitude or as an azimuth heading or simply an area defined by the uncertainty statistics of the position reported by GPS.
- the object locator 42 may be programmed for operating an alarm or automatically transmitting location information to a base station when the object locator 42 moves outside a perimeter.
- Such perimeter may be programmed by physically positioning the object locator 42 at extremes of an area and, while the GPS receiver 78 is operating, storing in the object locator's memory 68 the coordinates reported, thus establishing a boundary outside of which the object locator 42 will automatically report a position. Additionally, the perimeter may be defined by at least one coordinate stored in the object locator memory 68 . The perimeter is then determined by selecting stored algorithms to define the limits of a circular or other geometrical shape outside of which the object locator 42 will automatically report a position.
- the coordinate positions of the corners of a rectangular area may be obtained and stored.
- Each such position is an origin or center of a circle, the circle representing the GPS system error (position uncertainty, specified as a radius) of the location data provided by the GPS system 50 .
- the enclosed area is defined by establishing straight lines tangent to the outer arcs of each adjacent pair of circles along the intended area border.
- the radius of the circle may be, for example, approximately 5 meters (or a little over 16 feet) for civilian applications.
- a user would position the object locator at the corners of the square located about 15 meters (about 48 feet) apart.
- Many other algorithms for specifying an enclosed area are of course possible.
- a circle of radius of 5 meters, equivalent to an enclosed, circular area of diameter equal to 10 meters may be appropriate.
- a single coordinate position would suffice to specify the enclosed area, beyond which the object locator 42 , upon activation, automatically obtains location of its current position outside the perimeter of the specified circle and reports it to the base station.
- the base station in these examples, may simply be a pocket display paper carried by a user who may be within a specified circle (e.g., at the origin) or at some other location or even in motion with respect to the origin where the enclosed area is specified or with respect to the object locator.
- each of the major functional blocks shown in FIG. 4 may be implemented singly or collectively into integrated circuit structure which may be configured to fit within a housing of very small dimensions.
- a pocket pager that typically occupies a volume of approximately three to five cubic inches may weigh approximately four to six ounces.
- the GPS receiver 78 , the controller 66 , the paging transmitter 92 and the paging receiver 60 may be integrated into a single integrated circuit structure.
- the controller 66 may comprise a single chip microprocessor or microcontroller or digital signal processor which may be programmed to provide a variety of functions and operational features. Such programs may be stored in memory 68 for use by the controller 66 in controlling the operation of the object locator 42 .
- the paging receiver 60 , the paging transmitter 92 and the GPS receiver 78 while shown as functional blocks, in reality, each may have a number of complex functions incorporated therein. Thus, many configurations and functional operations are possible within the scope of the block diagram illustrated in FIG. 4 .
- the detailed description which follows will illustratively provide descriptions of some of the basic operational features of the object locator system 10 of the present disclosure. One such feature represented by the signal detector block 106 will be described hereinbelow in conjunction with FIG. 7 .
- FIG. 5 there is illustrated a flowchart for the operation of the object locator 42 shown in FIG. 4 in the case where the user desires to determine the location of the object locator 42 .
- This circumstance may represent any number of user activities including an owner's efforts to determine the location of a pet dog or a pet cat, for example.
- the operation illustrated in FIG. 5 may also include a situation where an owner desires to track versus time, an object to which the object locator 42 is attached.
- the flowchart of FIG. 5 may also illustrate the situation when the object locator 42 is attached to a person and it is desired to know the location of that person at some particular time or some other previous time as further described below.
- the flow begins at block 202 with the start of the sequence of operations, which is followed by decision block 204 in which the object locator 42 seeks to determine whether a page requesting location information has been received by the input 40 of the two-way paging receiver 60 . If the result of this determination is in the negative, then the flow returns to the input of the decision block for a retry. If, however, the result of the query was affirmative, then the flow proceeds to block 206 in which the GPS receiver 78 is enabled to acquire the location coordinates of the object locator 42 by receiving signals from the global positioning satellite system 50 illustrated in FIG. 1 .
- the object locator 42 Upon successfully acquiring the coordinates of the object locator 42 and thus of the individual object or animal to which the object locator 42 is attached, the object locator 42 then operates to store the coordinate information in block 208 by loading the coordinate information into the memory 68 of the controller 66 in the object locator 42 .
- coordinate information may be associated with a time stamp.
- time stamp derived from the GPS satellite system, may then be stored in block 208 for later retrieval. Additionally, such coordinate information may further be associated with other data such as object locator 42 operational status or battery condition.
- the flow then proceeds from block 208 , where the coordinates were stored in the memory 68 , to block 210 , wherein the object locator 42 is configured to transmit the coordinates in response to the request received over the two-way paging system 12 .
- the transmission of coordinates will occur in the opposite direction utilizing the same two-way paging system 12 over which the request for location coordinates was received in block 204 .
- the flow proceeds to a timer block 212 which provides a measured interval of time during which the object locator 42 attempts to acquire the coordinates at the particular time from the GPS system 50 .
- a typical GPS system often takes a substantial amount of time to acquire location coordinate information from a sufficient number of satellites in order to fix the location of the object locator 42 with a sufficient degree of precision.
- the time required involves receiving several signals under conditions which may vary widely from instant to instant, which impairs the ability of the GPS receiver 78 as shown in FIG. 4 to obtain complete location data to respond to the request received by the paging receiver 60 in the object locator 42 .
- the time value represented by the timer operating in block 212 may be on the order of five to ten minutes, for example. In block 212 , if the timer has not reached the time-out value, then the flow returns to the input of block 206 where the object locator 42 again attempts to acquire the coordinates from the GPS system 50 .
- FIG. 5 thus illustrates a basic mode of operation of the object locator 42 . It will be appreciated that many variations on this basic operating mode are possible and may be used to enhance the operation of the object locator 42 . Such features may be programmed into the controller 66 of the object locator 42 .
- FIG. 6 there is illustrated a flowchart for the operation of the object locator 42 in the circumstance where it is activated, in this illustrative example, to obtain location information from the GPS receiver 78 and transmit coordinates only when the object locator 42 is in a position beyond a distance limit defining a designated area surrounding or relative to the base station or some other defined location such as an origin from which the request for location coordinates was initiated.
- the object locator is activated to transmit location coordinates when it is secured to the object, power is coupled to the object locator and the object locator passes the perimeter of a defined enclosed area.
- the object locator may also be activated to transmit location coordinates by remote command or query from a base station or periodically by a timer in the object locator controller.
- the flowchart in FIG. 6 also shows additional steps in the operational sequence which may be used to enable and disable the GPS receiver 78 within the object locator 42 .
- the GPS receiver 78 is typically a device which requires substantial electrical power to operate. It is prudent to minimize the power drawn from the object locator battery 70 in FIG. 4 by limiting the operating cycle of the GPS receiver 78 .
- the GPS receiver 78 in this example is permitted to become operational only long enough to obtain the coordinate information that is required by the object locator 42 .
- the flow proceeds from start block 220 to a decision block 222 to determine whether the object locator 42 has received a query from the base station 18 . If a query has not been received, such as occurs during an automatic mode or by command, the flow proceeds along the “N” path to a timer block 224 wherein the object locator 42 may operate a timed sequence to periodically enable the GPS receiver 78 to acquire location coordinates whether or not a query is received from the base station 18 . When the timer of block 224 times out, the flow proceeds along the “Y” path to a block 226 to enable the GPS receiver 78 .
- the automatic mode is overriden and the flow proceeds along the “Y” path to block 226 to enable the GPS receiver 78 .
- the flow in the object locator 42 proceeds from block 226 to block 228 to acquire the coordinates of the location of the object locator 42 . Thereafter, the flow proceeds to decision block 229 to determine whether the object locator 42 is beyond a predetermined perimeter with respect to the base station 18 or other origin location which defines a designated area.
- the designated enclosed area surrounding the base station 18 or origin defines an area in which operation of the object locator 42 is inhibited because the object having the object locator 42 attached thereto is in the immediate vicinity of the base station 18 or is within the radius of uncertainty with respect to the origin as described hereinabove. Beyond the designated enclosed area the object locator 42 automatically reports location data to the base station 18 .
- the predetermined perimeter distance limit or radius may typically be set, for example, to approximate the boundary of the residence of the owner of a pet animal, beyond which it is desired to obtain location information of the pet animal provided by an object locator 42 (or, pet locator 42 in this example) attached to the pet. If the result of the determination in block 229 is negative, the flow proceeds along the “N” path to decision block 239 wherein a counter provides for a predetermined number of trials to establish whether the object locator 42 is beyond the predetermined limit required in block 229 . When the counter in block 239 completes the last count, the flow proceeds to a block 241 when the object locator 42 outputs a preformatted message to the base station 18 that the object locator is still within the predetermined limit.
- the flow proceeds along the “Y” path to the input of the decision block 222 .
- decision block 229 if it is determined that the object locator 42 is beyond the predetermined limit, meaning the coordinates are to be stored, the flow proceeds along the “Y” path to block 240 wherein a counter provides for a predetermined number of trials to establish whether the object locator 42 is beyond the predetermined limit required in block 229 .
- the flow proceeds to block 230 to store and, in some cases, time stamp the location coordinates acquired from the GPS satellite during the step performed in block 228 .
- the enable signal applied to the enable terminal 90 operates to awaken the GPS receiver 78 so that it may communicate with the GPS system and obtain location information coordinates for the object locator 42 .
- the flow proceeds from block 226 where the GPS receiver 78 is enabled to a block 228 where the object locator 42 acquires the coordinate information from the global positioning satellite system 50 .
- the controller 66 within the object locator 42 upon acquiring the coordinates of the object locator 42 from the GPS receiver 78 , the controller 66 within the object locator 42 causes the location and time information to be stored in the memory 68 of the object locator 42 in the operational block 230 of FIG. 6 .
- the flow then proceeds to a block 232 where the controller 66 operates to disable the GPS receiver 78 such that it will no longer continue to drain power from the battery, until the next time that it is desired to acquire coordinate information from the GPS system 50 .
- the flow proceeds to a block 234 wherein the object locator 42 provides the location data on output terminal 98 along path 96 to the data input 94 of the paging transmitter 92 .
- the location information is then transmitted via the two-way paging system 12 to the base station 18 shown in FIG. 1 .
- the flow proceeds from block 234 following the transmission of the coordinate information to a time-out block 236 where a timer provides an interval of time in which the object locator 42 is permitted to acquire the coordinate information from the GPS system, thus maximizing the opportunity to acquire the coordinates before the object locator 42 becomes inactive.
- a timer provides an interval of time in which the object locator 42 is permitted to acquire the coordinate information from the GPS system, thus maximizing the opportunity to acquire the coordinates before the object locator 42 becomes inactive.
- the time-out value may again typically be on the order of five to ten minutes, although the time duration may legitimately be any value that corresponds with the particular circumstances of use and, in fact, may be adjustable in some applications.
- the operation loops back around to the input of block 226 and enables the object locator 42 to continue attempting to acquire the location information from the GPS system.
- the flow proceeds along the “Y” path from block 236 back to the start of the sequence at the input to the decision block 222 where the object locator 42 is enabled to check whether the object locator 42 is positioned beyond the predetermined limit as previously explained.
- FIG. 6a there is illustrated a block diagram of a configuration that enables reporting the direction and rate of movement of the object to which collar 45 is attached.
- This embodiment is very similar to that shown in FIG. 6 and shares functional blocks—which have the same function and reference numbers—with FIG. 6 .
- the controller 66 within the object locator 42 Upon acquiring the coordinates of the object locator 42 from the GPS receiver 78 , the controller 66 within the object locator 42 causes the location and time information to be stored in memory 68 of the object locator 42 in the operational block 230 of FIG. 6 a .
- the operational flow described in FIG. 6 a illustrates the operation in the case where the object locator is beyond the limit previously set as described hereinabove for FIG. 6 .
- the user may desire to know the direction and rate of movement of the object locator 42 . Determination of the direction and rate requires analysis of a sequence of information containing position coordinates and the time at which each set of coordinate data were collected. In order for the calculation to be accurate and timely, the data must be current. Accordingly, the user may cause a message to be sent from the base station 18 to the object locator 42 to designate the number, N, of coordinate and time data sets to be taken and used in the calculation of the direction and rate of movement of the object locator 42 .
- the object locator 42 receives the previously described message from the base station 18 , the flow described in FIG. 6 a begins at start block 220 .
- the flow in FIG. 6 a begins with start block 220 wherein a preformatted message indicating the number, N, of required samples of location and rate of movement data is sent from the base station 18 to the object locator 42 .
- the GPS receiver is enabled at block 226 and begins to acquire coordinates in block 228 . Since the object locator 42 in this illustrative example is already beyond the predetermined limit the decision block 229 passes the flow to block 230 .
- the flow then proceeds to a decision block 233 wherein a counter provides for a predetermined number, N, of coordinate and time data sets to be stored and saved in memory 68 .
- the minimum required number of coordinate and time data sets to make a calculation of direction and rate of movement, of course, is two.
- N may provide more accurate, timely results.
- the flow proceeds to block 235 wherein data previously collected and stored in memory 68 is accessed and processed to determine the direction and rate of movement of the object locator 42 and then, flowing to block 237 , the resulting direction and rate calculations are stored in memory 68 .
- the flow then proceeds to block 232 where the controller 66 operates to disable the GPS receiver 78 .
- the flow proceeds to block 234 wherein the object locator 42 provides the direction and rate of movement data on output terminal 98 along path 96 to the data input 94 of the paging transmitter 92 .
- the direction and rate of movement information is then transmitted via the two way paging system 12 to the base station 18 shown in FIG. 1 .
- Messages reporting direction of movement are preformatted to transmit a symbol, such as an arrow, representing the direction of motion of the object locator in addition to alpha-numeric characters showing location.
- FIG. 6 b there is illustrated a flow chart to provide for reporting the return of the object locator 42 to within the predetermined limit after initially going beyond the limit.
- This embodiment is very similar to that shown in FIG. 6 and shows functional block—which have the same functions and reference numbers—with FIG. 6 .
- decision block 229 Upon either a base station query or a timed sequence (or duty cycle) query, decision block 229 outputs a negative result when the object locator 42 is now within the predetermined limit. The flow proceeds to decision block 231 to determine whether the object location 42 has previously been beyond the limit.
- the flow proceeds to blocks 230 , 232 and 234 wherein the object locator 42 reports, via a preformatted message retrieved from memory 68 , to the base station 18 that the object locator 42 is now within the predetermined limits, i.e., the pet animal or object has returned close to the base station.
- the report may be indicated at the base station 18 by a symbol or other characters associated with the information.
- the flow proceeds along the N path to the block 239 , the counter which regulates the number of trials for recognizing a beyond limit condition. Upon reaching the predetermined count in block 239 the flow proceeds to block 241 where a message “object locator is still within the limit” is issued to the base station 18 .
- the object locator 42 there are defined four concentric geographic regions. In the center is the immediate vicinity of the base station 18 or near range which may, for example, be roughly equivalent to the residential yard of the owner of a pet that wears an object locator.
- the active range of the object locator 42 is separated from the near range by a predetermined inside perimeter or limit.
- the outer range within which the object locator operation is marginally capable of reliably providing location information is not limited. The report to the base station 18 of locations within this outer range may be accompanied by a preformatted message specific to this circumstance.
- such a message in this instance might state: “The last known position and heading (of the object or pet) is” followed by the coordinates and information about the heading.
- the last geographic region, beyond the outer range and defined by the loss of signal from the base station 18 is the far range, where the object locator is unable to provide location information.
- the predetermined inside perimeter limit and the predetermined outside perimeter limit between which lies the active, reliable range of the object locator.
- the inside perimeter will depend, in general, upon the resolution parameters of the GPS system 50 .
- the outside perimeter may, generally, be defined by a signal strength parameter such as the reception strength of a beacon signal.
- FIG. 7 there is illustrated a pictorial block diagram of one configuration for providing a predetermined limit signal to the object locator 42 .
- a base station 18 coupled with its antenna 126 through a cable 128 and operating to produce a signal which is radiated according to the radiation pattern characteristic of the antenna 126 of the base station.
- an object locator 42 which includes a signal detector block 120 coupled to an antenna 122 through a cable 124 . It will be noted that the base station 18 is operating in a transmit mode and the object locator 42 is operating in a receive mode via antenna 122 .
- the object locator 42 by comparing the received signal strength of the signal transmitted by the base station from antenna 126 with a reference signal stored within the signal detector 120 , may determine whether it is near or far from the base station 18 . It is presumed in this example that the signal strength measured between the base station 18 and the object locator 42 falls off in a predictable manner as compared with the distance that separates the object locator 42 from the base station 18 . It will be appreciated that this technique may be used to define a predetermined inside perimeter limit signal that defines when (or where) the object locator is to begin providing location information as the animal or object wearing the object locator 42 moves away from the base station 18 . This technique may also be used to indicate when the object locator has moved—or is moving—past an outside perimeter, beyond the useful range of the object locator 42 .
- an alternative to comparing the limit signal with a reference value is to simply utilize the signal-to-noise characteristics of the receiver in the object locator 42 .
- a limit is thereby provided.
- the limit may be adjusted simply by adjusting the base station signal strength.
- a predetermined limit may thus be established by controlling the signal strength of the base station 18 signal such that at an imaginary boundary 130 such as a predetermined outside perimeter surrounding base station 18 is defined.
- the signal strength is of a sufficiently low value which can just be detected by the signal detector 120 in the object locator 42 at the imaginary boundary 130 .
- the object locator 42 antenna 122 is greater than a distance indicated by the radius “r” from the base station 18 , then no signal will be detected (or it will be below an acceptable threshold) and the object locator 42 is presumed to be beyond the predetermined outside perimeter limit represented by the distance “r”, which may also be thought of as an acceptance radius. If, however, the object locator 42 receives or detects the signal emitted by the base station 18 (or it is above the predetermined threshold), then it is presumed that the antenna 122 of the object locator 42 is within the radius “r” and the object locator 42 may, at that point, be activated to acquire location information from the GPS system 50 and report it to the base station 18 .
- the base station 302 includes a paging receiver 304 which has a receiving antenna 306 coupled to the paging receiver 304 by a cable 308 .
- the output of paging receiver 304 is supplied at an output 310 along path 312 to an input 314 of a processor 316 which receives and processes the location information for output or display.
- a processor 316 which receives and processes the location information for output or display.
- the information is stored along a path 318 in a register 320 from which the information can be retrieved along path 322 by the processor 316 for output at terminal 324 along path 326 to the input 328 of a data display 330 .
- the location information is processed for display as data which may be in the form of degrees of longitude and latitude, the names of the closest major street intersections or in terms of polar coordinates such as an azimuth heading and a distance between the base station 302 and the object locator 42 .
- a base station 350 which includes a paging receiver 304 .
- Paging receiver 304 receives location information transmitted by object locator 42 over path 305 to the antenna 306 of the paging receiver 304 along cable 308 .
- Paging receiver 304 is coupled from an output 352 along path 354 to an input 356 of processor 358 in the base station 350 .
- Processor 358 may also have access to a register 380 along path 378 from which the processor 358 may further obtain stored location information along path 382 from register 380 .
- Such location information is, of course, available from the GPS receiver 368 which is coupled at an output 370 along path 372 to an input 374 to processor 358 .
- This GPS receiver 368 is part of base station 350 and enables the base station 350 to provide an enhanced display of the location information obtained from the object locator 42 .
- a GPS display 366 that obtains data concerning the location coordinates from processor 358 at an output 360 which flows along path 362 to an input to the GPS display 366 at input 364 .
- the GPS display 366 is configured to provide a map of the area that includes both the base station 350 and the object locator 42 , and thus display the relative position of each component of the object locator system 10 with respect to the other.
- a map may be shown with streets or thoroughfares indicated thereon and indicia included in the display showing the respective location of the base station 350 and of the object locator 42 .
- FIG. 10 there is shown a flowchart of the operation of the combined units of the object locator system 10 of the present disclosure as illustrated in FIG. 1 .
- the flow begins at block 402 where the routine starts and thereupon flows to a block 404 in which the base station 18 requests location information by paging the object locator 42 .
- the base station 18 transmits a request for location information to the object locator 42 .
- the flow proceeds from block 404 to block 412 where the object locator 42 proceeds through the sequence to enable the GPS receiver 78 in order to obtain new location coordinate information.
- the object locator 42 checks its own memory—see, for example, the block diagram of the object locator 42 shown in FIG.
- the flow proceeds to a block 424 wherein the base station 18 makes a determination as to whether it has received the requested coordinate information from the object locator 42 . If the result is affirmative, then the flow proceeds along the “Y” path to a block 428 where the base station 18 proceeds to output or display the coordinate information to the user at the base station 18 . Thereupon, the flow proceeds from block 428 to a block 430 wherein the routine ends.
- the base station 18 determines whether it did not receive the coordinate information as requested, then the flow proceeds to block 426 along the “N” path to a decision block 426 .
- the base station 18 determines whether the most recent page of the object locator 42 was, in fact, the last attempt permitted within the protocol for the base station operation. If the result is affirmative, then the flow proceeds along the “Y” path to block 418 where the object locator 42 operates to disable the GPS receiver 78 so that it no longer uses power from the battery 70 of the object locator 42 and thereafter proceeds to block 430 where the routine ends. If, however, the result of the determination in block 426 was negative, then the flow returns to the start of the routine at the input to block 404 where the base station 18 re-attempts to page the object locator 42 .
- the object locator 42 checks to determine whether location coordinate information is, in fact, in the memory 68 of the object locator 42 . If the result is negative, the flow proceeds along the “N” path to block 414 where the object locator 42 acquires the new coordinate information and, as previously described, proceeds in block 416 to store the new coordinate information in memory 68 of the object locator 42 . The flow then returns to the input of block 412 wherein the GPS receiver 78 is enabled.
- the above noted object location system was disclosed as being utilized in conjunction with a pet, such that the pet owner can determine the location of their wayward pet.
- the locator as described hereinabove, in one embodiment, is triggered to determine the location of the pet in response to receiving a signal from a paging system.
- the paging system utilizes existing infrastructure in order to direct a message over a wireless link to a moving object, such as the pet. This only requires the inclusion of a paging receiver tuned to the frequency of the paging transmitters. Of course, there are multiple paging transmitters disposed about any given area. If the pet wandered outside of the range of all of these paging transmitters, then the system will not work. This would then, in the alternative, require a direct RF link to the pet.
- the locator 42 will do one of two things. First, it could merely search its own memory to determine if location coordinates are stored therein from a previous acquisition operation of the GPS system. If so, these could be transmitted back to the requester. Alternatively the GPS system is turned on in response to receiving the request and then the location determined. Of course, as described hereinabove, there are provisions made for situations wherein the GPS system cannot be acquired.
- the disclosed embodiment sets forth the use of a two-way pager.
- These two-way pagers are desirable in that they make use of the existing infrastructure of the paging system. This is facilitated by the inclusion of a plurality of receivers at each of the paging towers or paging “sticks” which allow the signal to be received and forwarded back to a central station. This central station then processes the information received and forwards it to the user.
- This information is in the form of coordinates. This coordinate information can then be relayed back to the user in any number of ways. It could actually be forwarded via a paging channel to the user, which might result in a latency of approximately two to five minutes.
- the two-way system that can be utilized is a conventional system, one example of such a conventional system described in U.S. Pat. No. 5,708,971, issued Jan. 13, 1998, entitled “TWO-WAY PAGING SYSTEM AND APPARATUS,” which is incorporated herein by reference.
- the object locator 500 comprises three major circuit blocks, a controller 502 , a GPS receiver 504 and a communication transceiver 506 .
- controller 502 which may be a standard type microcontroller or microprocessor, is a memory 508 .
- Memory 508 may include random access memory (RAM), non-volatile RAM or some form of read-only memory (ROM).
- Controller 502 further includes a location data port 510 for receiving location data from GPS receiver 504 .
- Controller 502 also includes a first communication port 512 for exchanging data with communication transceiver 506 .
- Controller 502 further includes a third communication port 514 for exchanging data with an infrared data port 562 or an RF data port 564 .
- the data is exchanged between the third communication port 514 along a bidirectional data bus 560 which couples the third communication port 514 with a data bus selector 566 which selects between a data bus 560 A coupled to infrared data port 562 or couples via data bus 560 B to RF data port 564 .
- a rechargeable battery 516 which may receive energy during recharging from solar cell 552 which is coupled along a path 554 to a charging circuit 556 which in turn is coupled to the rechargeable battery 516 along a path 558 .
- Power from the rechargeable battery 516 is coupled along path 568 which includes an SPST switch 570 in series with path 568 for controlling the application of power to a terminal 571 on the controller 568 .
- Power is connected from the terminal 571 to the GPS receiver 504 and the communications transceiver 506 along a path not shown in FIG. 11 for clarity.
- the charging circuit 556 may be configured otherwise than with connection to a solar cell 552 .
- charging circuit 556 may be a mechanical electric generator actuated by movements of object locator 500 when attached to a wearer of the object locator 500 .
- the GPS receiver 504 receives signals at an input 518 from a patch antenna 520 via a path 522 .
- the output of the GPS receiver 504 is coupled from an output 524 along a path 526 to an input terminal of the location data port 510 within controller 502 .
- GPS receiver 504 is enabled by a control signal originating within controller 502 and coupled from an output 550 along a path 544 to an enable terminal of GPS receiver 504 .
- the communication transceiver 506 includes a duplexor 534 which interfaces between the transmitter 530 and receiver 532 portions of the communication transceiver 506 and a dual mode antenna 536 via a transmission line 538 .
- Duplexor 534 provides the interface between the respective transmit and receive modes during the operation of commination transceiver 506 , enabling the communication transceiver 506 to use a common antenna 536 .
- the transmitter 530 portion of communication transceiver 506 is enabled for its operation along a path 546 originating in controller 502 and coupled from an output 550 to an enable terminal on transmitter 530 .
- the receiver portion 532 of communication transceiver 506 is enabled by a control signal originating within controller 502 and coupled from the control outputs 550 along a path 548 to an enable terminal of receiver 532 .
- the signal outputs from communication transceiver 506 are coupled from the receiver 532 via a second communication port 540 along a path 542 to an input of the first communication port 512 within controller 502 .
- Signals to be transmitted originated within controller 502 are coupled from first communication port 512 along the bidirectional data path 542 to an input terminal of the second communication port 540 coupled therefrom into the transmitter 530 within communication transceiver 506 .
- a display 564 is provided to display data coupled along a path 566 from the controller 502 .
- the display 564 may be typically a liquid crystal display having a capability of a small number of lines of text or symbols.
- the display 564 may be caused to access data within controller 502 by the use of a readout control 568 which is coupled to the display along a path 570 .
- Readout control 568 may be used to activate or deactivate the display, to scroll through various lines of data available for display or to select particular information to be displayed.
- a test button 572 is also coupled to controller 502 via a path 574 which enables the user to manually actuate the object locator 500 to cause an operational test according to a routine stored within controller 502 to check various selected functions of the object locator 500 .
- Another device coupled to controller 502 includes a magnetic compass 576 which provides an output signal along a path 578 to the controller 502 to provide information regarding the direction or hitting of successive coordinate positions obtained and reported by the object locator 500 .
- a signal detector 580 provides an output along a path 582 to the controller 502 when a parameter of the RF signals received by the object locator 500 exceed a predetermined threshold for the purpose of determining whether or not the object locator 500 is within or outside of the useful operating range or to define the minimum distance of the base station location before which the object locator 500 is not enabled to operate and obtain location coordinate data because the object locator or the pet locator is attached to an object or a pet animal which is very close to the base station and, for example, line of sight distances short enough for accurate and ready visual location of the object or pet.
- FIG. 11 represents a composite embodiment of the object locator 500 with a selection of typical features to illustrate some of the possible functions that may be accomplished with the object locator 500 of the present disclosure.
- the various features illustrated in FIG. 11 may be useful in the following ways.
- the memory 508 in controller 502 may contain information as to the wearer's name, it's home address, a contact telephone number, vaccination status, veterinarian name and any other pertinent information that would be appropriate for an object locator 500 worn by a pet animal.
- a program in controller 502 may be organized to store a portion of the operational data in a non-volatile memory within memory 508 for purposes of data backup. Similarly, location and associated time data may be stored for recall during operations which calculate direction and rate of movement information for transmitting to the base station along with the current coordinate information.
- the information stored in memory 508 such as the wearer's name, home address, contact telephone number, vaccination status, veterinarian's name and the like may also be output to the display 564 by operation of the readout control 568 . This particular feature enables someone who finds the pet animal wearing object locator 500 to access the information stored within the object locator memory 508 and take appropriate action to return the pet to its owner or to render assistance to the pet if such assistance is indicated.
- one of the functions of the signal detector 580 is to provide an indication when the object locator is about to move beyond its normal range of operation with respect to the base station and send a message to the base station indicating that the object locator 500 is about to become out of communication with the base station.
- the object locator 500 is enabled to send a message to the base station if the satellite signal is lost, that is, the GPS receiver 504 is no longer receiving location information transmissions from the global satellite system.
- the magnetic compass 576 may be activated to send direction information to the base station if the satellite signal is lost thereby providing information as to the last known location and heading of the object locator 500 .
- the infrared data port 562 and the RF data port 564 are provided to write or read data to or from the memory 508 in controller 502 via the third communication port 514 .
- the infrared data port 562 may typically include an optical transducer which is not shown for clarity and associated interfacing circuitry also not shown between the optical transducer and the controller 502 .
- the optical transducer and the associated interface circuitry are well known in the art and will not be further described herein.
- data may be downloaded from the object locator 500 via the infrared data port 562 as an alternative to sending a communication command from the base station to the object locator 500 .
- data may also be downloaded from the object locator 500 through the RF data port 564 as an alternate technique.
- data may be uploaded to the object locator through either the infrared data port 562 or the RF data port 564 by appropriately selecting the data bus selector 562 to couple the data to the third communication port 514 in controller 502 .
- a pet owner desiring to use the pet locator contacts and subscribes to a paging service and obtains a two-way paging transceiver or, “pager,” which may or may not be included in the purchase price of the pet locator.
- the owner with the pager becomes the host or base station.
- the pet locator is attached to the pet and the pet locator energized, typically by a switch on the pet locator assembly to activate the pet locator.
- the owner defines a designated enclosed area substantially surrounding the location of the host, e.g., a residence lot. The center of this enclosed area may be called an origin.
- This designation allows the pet locator to become active only when it is outside or beyond the perimeter of the designated enclosed area, where it can obtain location information about its location from the global positioning satellite system and communicate it to the host. Reports of location data may be transmitted automatically at regular intervals under the control of the pet locator or, alternatively it may be transmitted upon a request transmitted from the host or base station.
- An advantage of the “automatic reporting” pet locator system of the present disclosure is that once the user or pet owner becomes a subscriber to the paging system (any conventional two-way paging system will suffice) and installs and energizes, i.e., activates the pet locator by defining a designated area, no other action is required other than to observe the readout of the location data at the host location or base station.
- the installation procedure designates or enters the location of the host and defines the boundary or perimeter of the designated area.
- the boundary of the designated area may be set by entering the coordinates of a single location, e.g., the farthest or other corner of the user's residence property or even a central location.
- the designated area will approximate, for example, a circle centered at the host location and having a radius equal to the distance from the center at the specified single coordinate location to the perimeter of the circle defining the range of error or position uncertainty which is provided by the GPS system along with the location data.
- the boundary of the designated area may also be set by the owner entering the coordinates of a plurality of location points to designate a specific area or perhaps, a non-circular area.
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Abstract
Description
Claims (85)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/678,571 US6441778B1 (en) | 1999-06-18 | 2000-10-03 | Pet locator |
US09/860,375 US6480147B2 (en) | 1999-06-18 | 2001-05-18 | Portable position determining device |
US10/292,888 US7113126B2 (en) | 1999-06-18 | 2002-11-11 | Portable position determining device |
US11/446,318 US7336227B2 (en) | 1999-06-18 | 2006-06-02 | Portable position determining device |
US12/036,913 US7764228B2 (en) | 1999-06-18 | 2008-02-25 | Portable position determining device |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14004099P | 1999-06-18 | 1999-06-18 | |
US09/362,788 US6172640B1 (en) | 1999-06-18 | 1999-07-28 | Pet locator |
US09/678,571 US6441778B1 (en) | 1999-06-18 | 2000-10-03 | Pet locator |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/362,788 Continuation-In-Part US6172640B1 (en) | 1999-06-18 | 1999-07-28 | Pet locator |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/860,375 Continuation US6480147B2 (en) | 1999-06-18 | 2001-05-18 | Portable position determining device |
Publications (1)
Publication Number | Publication Date |
---|---|
US6441778B1 true US6441778B1 (en) | 2002-08-27 |
Family
ID=27385440
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/678,571 Expired - Fee Related US6441778B1 (en) | 1999-06-18 | 2000-10-03 | Pet locator |
US09/860,375 Expired - Lifetime US6480147B2 (en) | 1999-06-18 | 2001-05-18 | Portable position determining device |
US10/292,888 Expired - Fee Related US7113126B2 (en) | 1999-06-18 | 2002-11-11 | Portable position determining device |
US11/446,318 Expired - Fee Related US7336227B2 (en) | 1999-06-18 | 2006-06-02 | Portable position determining device |
US12/036,913 Expired - Fee Related US7764228B2 (en) | 1999-06-18 | 2008-02-25 | Portable position determining device |
Family Applications After (4)
Application Number | Title | Priority Date | Filing Date |
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US09/860,375 Expired - Lifetime US6480147B2 (en) | 1999-06-18 | 2001-05-18 | Portable position determining device |
US10/292,888 Expired - Fee Related US7113126B2 (en) | 1999-06-18 | 2002-11-11 | Portable position determining device |
US11/446,318 Expired - Fee Related US7336227B2 (en) | 1999-06-18 | 2006-06-02 | Portable position determining device |
US12/036,913 Expired - Fee Related US7764228B2 (en) | 1999-06-18 | 2008-02-25 | Portable position determining device |
Country Status (1)
Country | Link |
---|---|
US (5) | US6441778B1 (en) |
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US7113126B2 (en) | 2006-09-26 |
US20080167816A1 (en) | 2008-07-10 |
US6480147B2 (en) | 2002-11-12 |
US20080001814A1 (en) | 2008-01-03 |
US7764228B2 (en) | 2010-07-27 |
US20040012519A1 (en) | 2004-01-22 |
US7336227B2 (en) | 2008-02-26 |
US20020003493A1 (en) | 2002-01-10 |
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